For by one offering he hath perfected for ever them that are sanctified.
The point of the verse is the phrase “by one offering“. The apostle wants us to see the effectiveness of the offering of Christ. In doing so he makes a secondary claim that is of immense blessing to those who are saved; we have been “perfected for ever“.
What God has done and is continuing to do in me as a Christian, and in every Christian everywhere, is a forever thing. It never ends. It isn’t revoked at some moment of sin in my life. No contract is broken if I am unable to keep my end of the deal. At the moment of my salvation God made me perfect in Christ Jesus. That is justification. For the rest of my life of earth God continues to work in my heart and soul for victory over sin and perfection in Christlikeness. That is sanctification.
God’s covenant with the believer is a for ever one.
Hebrews 10:14 God’s Covenant is For Ever
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